Cultivating blade assembly



g- 19, 1952 c. s. NOBLE ET AL CULTIVATING BLADE ASSEMBLY ATTORNEY Y R m 2 SHEETS-SHEET l CHARLES S. NOBLE, GERALD C. NOBLE,AND SHIRLEY E NOBLE Filed April 23, 1947 Aug. 19, 1952 N BLE ETAL 2,607,279

CULTIVATING BLADE ASSEMBLY Filed April 23, 1947 2 SHEETS-SHEET 2 INVENTORS CHARLES s. NOBLE, GERALD c. NOBLE AND SHIRLEY F. NOBLE Patented Aug. 19, 1952 CULTIVATING BLADE ASSEMBLY Charles S. Noble, Gerald G. Noble, and Shirley F.

Noble, Noblefcrd, Alberta, Canada Application April 23, 1947, Serial No. 743,294

17 Claims.

Our invention relates to improvements in cultivating assemblies, an object being to provide assemblies of the character herewithin described for attachment to the standards of a superstructure such as that shown in either the United States Patents No. 2,323,412 of July 6, 1943, or 2,345,702 of April 4, 1944, both granted to Charles S. Noble, and it is to be understood that the assemblies herewithin described may be V-shaped when viewed in plan in which case'cne assembly would be attached to each of the standards shown in the above patents, or one larger assembly could be attached to a single central standard; alternatively the assemblies herein described may be straight. as in the above mentioned patents and extend either normal to the direction of travel of the superstructure or diagonal thereto.

A further object of the cultivating assemblies described herein is to provide more effective means for use particularly in heavy "soil for eliminating the drag caused by subsidence of a topsoil-layer particularly when heavy or wet, back onto the trailing surface of the carrier part of our assemblies by providing alonger free-fall distance between the trailing edge of the blade and the upper surfaceof the trailing side of the carrier (or in the alternative embodiment of Figure 3, between'the'trailing edge of the leading side of the blade and the rear edge of the trailing side thereof during which such trailing side will have moved forward out of the way of the sub siding portion, so that, in'the result, draft and the accompanying expenditure of power and fuel is reduced;

A further object of the assemblies herewithin described is to provide a reversible blade which, when worn and reversed may be pitched at a steeper angle to offset the reduction in width, the steeper pitchingof-the blade when worn facilitating the increased levitation of a topsoil-layer at the crest of the wave thereof. g

A further object of our invention is to provide a carrier of the character here'within described which is of very substantial strength and rigidity for its weight and cross-sectional dimensions.

A further object is 'to provide, as depicted in Figure 3 an alternative embodiment'of cultivating blade for use in association with the form of carrier herewithin described, which is reversi- 2 initial cultivating stroke in somewhat lighter soils, and effecting a soil crumbling and root macerating action.

With the foregoing ob ects in view, and such other objects and advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, our invention consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, reference being had to the accompanying drawings, in which:

Figure 1 is a cross-sectional elevation of one embodiment of our cultivating assembly attached to a standard, andshowing the blade forming a part of such assembly'shown worn and reversed in phantom lines, this cross-section being on the line l--l of Figure 4.

Figure 2 is a dimensioned cross-section of the blade of Figure 1. V

Figure 3 is a cross-section on the line 2-2 of Figure 5 of an alternative embodiment of cultivating blade and carrier assembly shownin connection with a blade and carrier of V-shape when viewed inplan.

Figure 4 is a representation in plan for purposes of orientation only showing the assemblies of either Figures 1 or 3 as they would appear if straight and secured to" the lower ends of the standards referred to in the above Noble patents.

Figure 5 is a plan representation for purposes of orientation only illustrating a V-shaped assembly of our blade and carrier'combination each of a pair of which would be attached to one of the two standards illustrated in the above patents.

In the drawings like characters of reference -indicate corresponding parts in the different figures.

It is to beunderstood that the assemblies herewithin described -are primarily for the first stroke after harvesting while the land is in stubble and generally for opening up a topsoil-layer. 1 particularly when the land is dry and hard, preparatory to successiveprocessing of such topsoil-layer ble, andwhich presents a shorter and comparai tively steep supra-convex leading side, with a similar trailingside so'thatthe configuration in cross section-is seenjtdbewhat isstructurally classified as suprafconvexly 'a'nti-clihal for. the

by weeding assemblies such as those shown'and described in our United States Patent application of even date and so titled.

In the United States Patent No; 2,373,703, of April '17, 1945;, to Charles S. Noble a cultivating blade and carrier is" shown for the initial opening up of a topsoil-layer. Since the invention of that embodiment however the. need inter alia for pitchingthe-blade at ,asteeper, angle has been demonstrated in. order to eflect a greater disturpancc g soil for the better-killing of weeds.

Such increased pitch could not however practicably be attained with the assembly of the above noted patent but can be obtained by the assembly depicted in Figure 1 with no loss of rigidity in the carrier against yielding arcuately in the horizontal plane, by the provision of a vertical free fall distance 2 between the trailing edge 3 of blade d and the. upper surface 5 of the trailing part 6 of carrier 1.

In Figure l we have intended to illustrate a topsoil-layer which is of heavier, moister, and more inert soil than the topsoil-layer l7 illustrated in Noble Patent No. 2,373,703, and which would drop back quickly or subside onto the trailing upper surface of the carrier of that patent thereby causing drag with resulting increase of power consumption. In Figure 1 of this application, however, the layer 1 is seen to fall clear of the carrier. Proceeding therefore to describe in detail the embodiment of Figure 1, and describing first our carrier 1 thereof, it is to be understoodthat same is to be considered for purposes of explanation and definition as divided into the aforesaid trailing side G, a forwardly and downwardly inclining leading side 8.

The upper surface 9 of: the leading side 8 is preferably planar, the'rear boundary of the said leading side being considered as the longitudinally extending ridge [0. Immediately to the rear of the aforesaid ridge is an intermediate concave riser portion H the trough or base I2 whereof is coterminus with the convex portion of the upper surface of the carrier trailing side immediately to the rear thereof.

The cultivating blade 4 is secured centrally and overlappingly to the leading side 8 at a forward and downward angle of inclination, and it will be seen that the trailing side 13 of our blade 4 overlies the forward portion or riser or step [I of the trailing side I of our carrier. By this arrangement it will be apparent that a topsoil-layer such as we have illustrated, and which, being heavy, commences to subside immediately it leaves the trailing blade edge 3, will not make contact with the trailing upper surface of our carrier until the same has moved ahead out of the way.

When referring to the leading and trailing sides of our blade 4, it is to be understood that we regard'the centre line as the boundary between these two sides, and in phantom lines 14 we have shown our blade reversed with the trailing side l3 projecting in advance of the carrier leading edge 15.

Proceeding to describe our blade 4 in detail in connection with Figure l and Figure 2, it will be seen that the upper or scouring surface I6 thereof is convex, the blade generally being preferably of the dimensions indicated in Figure 2, although naturally we do not desire to be restricted to such' dimensions. .The under surface I! of the blade provided with a longitudinally extending ridge 1 8 more specifically describable as a step. This step is boundedby what we. arbitrarily designate for purposes of definition as an external angle [9, and an internal angle 28, the leading under surface portion 2] inclining from the external angle I9 towards the upper surface l6 in the direction of the bevelled leading edge '22. The under surface portion 23 extends from the internal angle 20 taperingly towards the upper surface I6 in the direction of the trailing bevelled edge 23. In other-words theleading side of the blade tapers in thickness from the step l8 towards the leading edge 22, and the trailing side l3 also tapers 4 in thickness from the step towards the trailing edge 3 of the blade.

From the construction thus described, it will be apparent that when the blade is reversed as illustrated in phantom lines in Figure 1, due to wear, the same will be pitched more steeply. Thus, although the blade will now terminate on the horizontal plane of the worn edge 25, topsoillayer I will nevertheless be elevated to the crest point 26 as we have designated by the phantom line 21.

The embodiment of our blade and carrier as illustrated in Figure 3 is preferably, but not necessarily V-shaped when viewed in plan as per Figure 5. The blade 29 consists of aleading side 30, and a similar trailing side 3| which we consider as extending from the elongated ridgeline 32 (or trailing edge of the leading side). It is reversible, both sides being steeply pitched and convex on theupper surfaces thereof so that during progress through the soil the topsoil-layer is levitated at a fast rate of inclination whereby the underside apex 33' thereof clears the trailing surface 34 and the whole undersurface subsides only as the whole blade and carrier slips clear ahead.

Thu in a reversible blade of steep pitch vwe have provided for free fall functionally equivalent to that indicated at 2 in Figure 1 and without loss of carrier stiffening by the provision of similar anti-clinal sides on either side of a central ridge-line.

The carrier 35 of the embodiment of Figure 3 is substantially similar to that. of Figure 1 save and excepting for the fact that in this instance we eliminate the reverse or trailing convex curvature of the latter. Thus the trailing side. 36 of carrier 35 is uniformly concave on the upper surface 31 thereof as from the elongated ridge 38 (which we regard as the boundary between the leading and trailing sides 39 and 36 respectively) to the trailing edge 49. .The aforesaid concavity constitutes a'step downwardly from the upper surface 4| of leading side 39 as in our first described embodiment of carrier but the rearward and downward trailing convexity is in this instance eliminated since the carrier trailing side is hooded by the blade, side 3| so that a subsidence-following curvature in the carrier in this location is unnecessary. 'It will however be apparent that a carrier of similar configuration to that depicted in Figure *1 may if desired be utilized if the drill holes 42 in the leading and trailing sides of blade 30 are relocated a little closer to the free edges of the blade.

For purpose of orientation we have depicted standards 43 as more fully illustrated in Noble U. S. Patent No. 2,323,412 and No. 2,345,702 in connection with the overground structure.

Since various modifications can be made in our invention as hereinabove described and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter'contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.

What we claim as our invention is:-

l. A cultivating assembly comprising in combination an elongated cultivating blade, and an elongated carrier therefor, said; carrier when viewed in cross-section being seen to embody a. leading side inclining forwardly and downwardly,

and. a trailing side. inclining rearwardly and ydownwardlyr said blade being secured .to the 7 upper surface of said carrier leading side, the

junction of the upper; surface ofsaidcarrier trailing side and the upper surface of said carrier leading, sidepresenting an obtuse angle constie tuting an-elongated ridge-the uppersurface of said carrier trailing side :being curved and-the portion thereof immediately behind aidridge being concave, the trailing side of said bladeoverlying said ridge'and concavity aforesaid, all for the purpose herein specified.

2. The combination according to claim 1 in which said blade is reversible and has an under surface provided with an elongated ridge thereon positioned to one side of the longitudinal axis of said blade, said surface when the blade is viewed in cross-section being seen to incline upwardly with respect to the upper surface thereof towards the leading and trailing edges thereof.

3. The combination according to claim 1 in which said blade is reversible, and in cross-section and when longitudinally and centrally bisected may be defined as having a leading side and a trailing side, said leading side having a longitudinally-extending step on the under surface thereof, said leading side tapering in thickness from said step towards said-leading edge and from said steptowards said trailing edge.

4. The combination according to claim 1 in which said blade is reversible and in cross-section and when longitudinally and centrally bisected may be defined as having a leading side and a trailing side, said leading side having a longitudinally extending step on the under surface thereof, said leading side tapering in thickness from said step towards said leading edge and from said step towards said trailing edge.

5. The combination according to claim 1. in which said blade is reversible, and in cross-section and when longitudinally and centrally bisected may be defined as having a leading side and a trailing side, said leading side having a longitudinally extending step on the under surface thereof, said under surface inclining upwardly with respect to the upper surface thereof from said step towards the leading and trailing edges of said blade.

6. The blade according to claim 5 wherein the upper surface thereof is curved.

7. The blade according to claim 5 wherein the upper surface thereof is convex.

8. In a cultivating assembly an elongated reversible blade having parallel topsoil-layer cutting edges, said blade as viewed in cross-section and when longitudinally and centrally bisected being definable as having a leading side and a trailing side, said leading side having a longitudinally extending step on the under surface thereof, said leading'side tapering in thicknes from said step towards said leading edge and from said step towards said trailing edge.

9. In a cultivating blade and carrier assembly and in combination, an elongated carrier, an elongated cultivating blade overlappingly attachable thereto, said blade having an upper surface seen to be convex when viewed in cross-section, said carrier when viewed in crosssection being seen to embody a forwardly and downwardly inclining leading side for the attachment thereto of said blade as aforesaid, and a trailing side having a curved upper surface inclining downwardly towards the trailing edge thereof, said blade also embodying leading and trailing sides projecting in advance of and to the rear of said carrier leading side respectively at downward and upward angles of inclination respectively, said carrier trailing side including an intermediate portion immediately 2 tofthe rear of theile ading" side thereof, said trailing blade sidehooding'said intermediate carrier portio therefrom. V "j 10. ,In a cultivating assemblyand in combination an elongated .carrierl forthej attachment thereto of an elongatedj cultivating blade, said carrier when viewed in, cross-sectionbeing seen to embody a forwardly and downwardly inclinin leading side for theattachmentthereto of said blade, and a trailingside whlchincludes a riser portionpresenting a stepup fro'm, the uppersurface of said trailing side tothe'upper surface of said leading sldeis spaced abovegthe upper surface of said trailing side which is to the rear of the said riser, the junction of said riserind leading side producing a longitudinally extending ridge all for the purpose, herein specified. 11. In a cultivating assemblyandin combination, an. elongated carrier for the attachment thereto of an elongated cultivating blade, said carrier when'viewed in cross-section being seen toembody a forwardly anddownwardly'inclining leading side for the attachment thereto of said blade, and a trailing side which includes a concave .riser portion presenting; a step up from the upper surface of said trailing side to the upper surface of said leading side so that the produced upper surface of said leading side is spaced above the upper surface of said trailing side which is to the rear of said riser portion, said last mentioned upper surface being convex and inclining downwardly towards the trailing edge of said carrier, the base of said concave riser portion being coterminus with said last mentioned convex upper surface, all as and for the purpose specified.

12. In a cultivating assembly and in combina tion, an elongated carrier for the overlapping attachment thereto of an elongated cultivating blade, said carrier when viewed in cross-section being seen to embody a leading side for the attachment thereto of said blade at a forwardly and downwardly inclining angle, and a trailing side, the upper surface of said carrier trailing side being concave, the junction of the upper surface of said leading'side and the upper surface of said trailing side presenting an obtuse angle and forming a longitudinally extending ridge upon the upper surface of said carrier, said blade projecting forwardly and downwardly in advance of said carrier leading side, and rearwardly to hood said concave upper surface to provide a space between the upper trailing edge of said blade and the upper surface of said carrier trailing side through which a topsoil-layer may fall freely, the said concavity in the upper surface of said carrier trailing side constituting a step downward from the produced stratum rearwards of the upper surface of said carrier leading side.

13. In a cultivating assembly, an elongated, reversible, cultivating blade which when viewed in transverse cross-section and considered as longitudinally and vertically bisected is seen to embody leading and trailing sides having convex upper surfaces, said leading side in situ inclining forwardly and downwardly, said trailing side in clining rearwardly and downwardly.

14. In a cultivating assembly, an elongated, re-.

and being spaced 15. Inran elongated cultivating blade rier combination, a carrier which, when viewed. in

transverse cross-section, and considered as longl tudinally and vertically bisected, ,is seen to em-v body leading and trailingsides, the formerj'of which inclines forwardly and downwardly for the attachment thereto of said blade, the latter having aconcave upper surface'inclining' rearwardly and dOWnwardly from 'the trailing edge of .said leading side so as to form an elongated ridge at the junction of-the'upper surfaces of said leading andtrailingsidesV v 16. The combination specified in claim 15 in whichthe elongatedlcultivating blade is reversible and which,-when viewed in transverse cross-sectionand: considered as longitudinally and vertically bisected, i seen to embody leading and trailing sides having convex upper'surfaces, said, leading side being attachable to the said leading side or said carrier, inoverlapping relationship and inclining. forwardly and downwardly therecver, said trailing side inclining rearwardly and downwardly over the concavely upper urfaced trailing side of said carrier. a 17. The combinatinn specified,in claim 15, in

which the elongated cultivating blade is reversible and; which, Whenviewed in transverse cross-seetion and considered as longitudinally and vertically bisected, is seen toembody'leading and trailing sides having convex upper surfaces, said REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,130,489 Dean i gMar. 2, 1915 1,692,086 Jakobsen Nov. 20-, 1928 2,094,424 Cole Sept. 28,1937 2,323,412 Noble July 6, 1943 2,345,702 Noble ,Apr. 4, 1944 2,373,703 Noble Apr. 17, 1945 

